Properly maintain your Mercruiser sterndrive. Change the lube every year or sooner if you suspect a problem.

Ad

Steps

1

Determine what model drive you have.

Ad

2

Read your owners manual.

3

Buy the correct amount and type of lube plus a little more.

4

Buy a little hand pump that fits the bottle of lube to fill the drive.

5

Place a clean oil drain pan under the drive to catch the old lube as it drains out of the bottom of the drive.

6

Use a large screwdriver and remove the lower drain plug.

7

Remove the top oil vent plug.

8

Let the unit completely drain.

9

If your drive has an internal drive lube monitor bottle in the boat, remove the bottle from its bracket and pour out the old lube. Look in the bottom of the bottle. If you see residue in the bottom of the bottle it should be removed and rinsed out with carb cleaner or Power Tune. Make sure the bottle is clean and dry.

10

If the old lube looks and smells bad it could be an indication of a problem.

11

Inspect the gear lube for evidence of metal particles or water intrusion.

12

If the lube looks bad and you suspect a problem, FIX the problem before placing the drive back into service.

13

If the lube was simply old and smelly it is a good idea to flush the drive one time with new clean lube.

14

To flush the drive fill the drive from the BOTTOM hole with enough lube to fill the drive and then let it drain out fully. Do NOT reuse the flushing lube.

15

Use a sharp pointy pick and make sure to remove the old drain plug gaskets from the drain and vent holes. Never reuse an old drain plug gasket. Old gaskets get brittle and hard as rock. Look closely in the hole and use the pick to make sure all of the old gaskets have been removed. Buy new drain plug gaskets and place them over the cleaned-up plugs.

16

Fill the drive from the bottom-up until the lube flows out of the top/side vent hole.

17

Install the top vent plug with the new gasket and tighten.

18

If your drive has an internal drive lube monitor bottle, continue to pump lube until there is approximately one inch of lube in the monitor bottle. If you don't, the upper unit will not be lubricated properly.

19

Remove the lube fill pump from the bottom hole and quickly install the bottom plug with its new gasket.

20

Wipe up any residual oil.

21

If your drive has an internal drive lube monitor bottle, add lube to the bottle up to the "full" line. Be aware that the drive might have an air bubble and that the system might "burp" after being run. This could result in a drop of the oil level in the bottle. Just top off the bottle with clean lube and keep an eye on it. Be sure to loosen the bottle cap to avoid creating pressure in the system. Pressure in the system will make a mess when the hand pump fitting is removed from the bottom fill hole.

Ad

We could really use your help!

Can you tell us about

Fashion Industry Careers?

Yes

No

Can you tell us about

Software?

Yes

No

Can you tell us about

recovering after illnesses?

Yes

No

Can you tell us about

Youth Dating?

Yes

No

Thanks for helping! Please tell us everything you know about

...

Tell us everything you know here. Remember, more detail is better.

Tips

Provide details.

Please be as detailed as possible in your explanation. We will take your detailed information, edit it for clarity and accuracy, and incorporate it into an article that will help thousands of people.Don't say: Eat more fats.Do say: Add fats with some nutritional value to the foods you already eat. Try olive oil, butter, avocado, and mayonnaise.